a short, low sound made by a person to express concern or disapproval:Loretta gave a cluck of impatience
2North American informal a foolish person.
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Universal
(of a hen) make a short, low sound:the chickens clucked and scratched in the dirt
(of a person) make a short, low sound with one’s tongue to express concern or disapproval:the bystanders shook their heads and clucked sympathetically [with object]:Carmichael clucked his tongue irritably
[no object] (cluck over/around) express fussy concern about:Pauline became worried about her health and constantly clucked over her